Float operated electrical switch assembly

In a float-operated electrical switch assembly for indicating the liquid level in a liquid containing system having a sidewall, said switch assembly comprising a tubular float housing, a float restrained to move in said float housing with changes in the level of a liquid therein, and a magnet mounted on said float, the improvement which comprises

• a tubular casing of non-magnetic material extending into said float housing transversely of said float housing, and having a portion projecting transversely outwardly from said float housing, the interior of said tubular casing being sealed from the interior of said float housing,
• duct means attached to said float housing and adapted to be fastened to said sidewall and to permit liquid to flow between said system and said float housing through said duct means while maintaining said float chamber in a vertical position,
• a switch unit housing containing an electrical switch unit, and connected to said projecting portion of said non-magnetic casing externally of said float housing, said switch unit housing having an opening in the side thereof remote from said non-magnetic casing,
• a removable cover for said opening, and
• a magnetically responsive switch actuator extending from said switch unit into a region within both said non-magnetic casing and said float housing for actuation by said magnet, said actuator and electrical switch unit being dimensioned to be removable through said opening when said cover is removed.